非均布轮载、层间界面及粘弹效应下沥青路面结构组合研究

项目名称： 非均布轮载、层间界面及粘弹效应下沥青路面结构组合研究

项目编号： No.51278389

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 建筑科学

项目作者： 李杰

作者单位： 武汉工程大学

项目金额： 82万元

中文摘要： 合理的路面结构组合是保障沥青路面使用寿命的基本前提。目前的沥青路面结构组合设计方法主要是一些原则性的要求，并无实质性的内容；而已有的沥青路面结构设计方法，基本上只是进行某结构层的厚度设计，没有从抗车辙、抗疲劳开裂以及抗裂缝扩展等方面，综合考虑路面各结构层厚度与模量的合理组合问题，同时，没有合理的考虑实际轮胎荷载、层间界面、荷温耦合下沥青层应力应变特性及裂缝扩展特性等等。本课题将通过开展动态回弹模量实验、界面特性实验、抗裂实验、松弛实验和车辙实验，从荷载-温度耦合角度出发，探讨非均布轮载、层间接触以及材料粘弹性条件下，沥青路面整体结构和各层的变形特性、包括疲劳开裂和裂缝扩展在内的温缩裂缝、反射裂缝和Top-down裂缝的特性；然后以此为基础，提出沥青路面结构的合理组合设计，并建立路面使用寿命与各结构层厚度及模量组合的相关关系诺莫图，为沥青路面结构的优化和使用寿命的提高提供理论基础和应用依据。

中文关键词： 沥青路面；结构组合；非均布轮载；层间界面；粘弹性

英文摘要： A rational structural combination, namely the combination of the thickness and modulus of each layer of the asphalt pavement, is the basic guarantee to make sure the enough life-span of asphalt pavement. In the current structural combination design methods of the asphalt pavement, only the design principles are emphasized, there is no substantive content. At the same time, as for the most popular asphalt pavement structure design methods, they are for determining the thickness of a special layer rather than for considering synthetically the combination of thickness and modulus for each layer, which should be based on the ability that resisting rutting, resisting the fatigue cracking and thermal cracking and top-down cracking and their propagation and so on. In addition, the mechanical responses in the asphalt pavement structure are strongly influenced by the tire-pavement contact pressure distribution and the interface layer characteristics. In virtue of the results of dynamic resilience modulus test, interface characteristics test, anti-cracking test, relaxation test and wheel tracking test, this study will focus on the permanent deformation characteristics, fatigue cracking and top-down cracking and thermal cracking and their propagation characteristics, which are not only for the whole pavement structure but

英文关键词： Asphalt Pavement；Structural Conbination；Non-uniform Wheel Load；Layer Interfaces；Viscoelastic